启停质量法水表检定装置的不确定度评定

摘要

详细介绍了启停质量法水表检定装置的不确定度评定方法,除了通常考虑的电子秤和密度计引入不确定度外,还考虑了出水口管路液面波动引起的不确定度、蒸发量引起的不确定度、水表和电子秤之间管容引起的不确定度和水中气泡引起的不确定度等规程内未列出的不确定度来源,使对启停质量法水表检定装置的不确定度评定更加合理,同时结合水表的实际情况,提出了水表不同流量点对装置的不确定度要求.%The uncertainty evaluation of standard facility is described in detail,except consideration of the uncertainty of electrical balance and hydrometer,the uncertainty of liquid level fluctuating in outlet pipeline,evaporation,volume between water meter and electronic scales and the bubbles in the water are also evaluated,which are not included in the verification regulation.It is more reasonable to evaluate the uncertainty of the water meter testing facility.Moreover,according to water meter actual using condition,the uncertainty requirements at different flowrate of water meter testing facilities is proposcd.